2021 Environment - Ecology

Consider the following kinds of organisms : 1. Copepods 2. Cyanobacteria 3. Diatoms 4. Foraminifera Which of the above are primary producers in the food chains of oceans?

  • 1 and 2
  • 2 and 3
  • 3 and 4
  • 1 and 4

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    2021 UPSC Environment PYQ | UPSC Insights | UPSC Insights